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Finding the Fourth Proportional to 100,653.94, 138,904.20 and 55,333.83

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Solution

The fourth proportional to 100,653.94, 138,904.20 and 55,333.83 is: 76,361.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,653.94 : 138,904.20 = 55,333.83 : x
  2. Step 2: Convert to fraction form
    100,653.94/138,904.20 = 55,333.83/x
  3. Step 3: Cross multiply
    100,653.94x = 138,904.20 × 55,333.83
  4. Step 4: Simplify right side
    100,653.94x = 7,686,101,389.09
  5. Step 5: Solve for x
    x = 7,686,101,389.09/100,653.94
  6. Step 6: Final answer
    x = 76,361.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.